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W91820N

13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS

Winbond 

W91820N SERIES

Two-touch direct repertory dialing:

OFF HOOK (or ON HOOK & HFI

), A , Ln

Access Pause

OFF HOOK (or ON HOOK & HFI ), D1 , D2 , R/P , D3 , ..., Dn

1. The pause function can be stored in memory.

2. The pause function is executed with normal dialing, redialing or memory dialing.

3. The pause function timing diagram is shown in Figure 6.

Pulse-to-tone (*/T)

OFF HOOK (or ON HOOK & HFI ), D1 , D2 , ..., Dn , */T , D1' ,

, D2' , ..., Dn'

1. If the mode switch is set in pulse mode, then it will perform

case a: D1, D2, ---, Dn, Pause (3.6 sec), D1', D2', ---, Dn'

(Pulse)

(Tone)

case b: (only for French version)

D1, D2, ---, Dn, * , D1', D2', ---, Dn'

(Pulse)

(Tone)

2. If the mode switch is set in tone mode, then the output signal will be:

D1, D2, ---, Dn, * , D1', D2', ---, Dn'

(Tone)

3. It can be reset to pulse mode only if ON HOOK is active. This is because it remains in tone mode

when the digits have been dialed out.

4. The function timing diagram is shown in Figure 7.

Flash

OFF HOOK (or ON HOOK & HFI

), Fn

1. Fn = F1−F4. If Fn is pressed, the dialer will execute a flash break time of 600 mS (F1), 300 mS

(F2), 73 mS (F3) or 100 mS (F4) and a pause time of 1.0 second, after which the next digit is dialed

out.

2. The flash key has the first priority of the keyboard function only one flash key will be released to

the user.

3. When the flash key is key in, the system will return to the initial state after the flash pause time is

finished.

4. The flash function timing diagram is shown in Figure 8.

-8-

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